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Changing
Have you ev
Who sets the
traffic? How
speed limit s
answer some
What Spe
Speed limits
of the majori
drivers natur
or not too fas
to go safely a
Speed limits
the speed co
on a particu
unfamiliar w
evaluate how
safer driving
drive at the s
Setting S
State law* re
at the state
studies show
The law sets
• 75 mph
• 70 mph
interstat
• 65 mph
How are spee
governments
Transportatio
in accordanc
in the Man
(MUTCD) a
Commission.
limits are app
limits, the
Commission
requests for
made to their
g a Speed Lim
er wondered how s
em? Does lowerin
do you get one ch
solve a problem?
e of these questions
eed Limits Do
are established to r
ity of drivers on a
rally select a comfo
st, but one that will
and without undue
are posted primar
nsidered reasonabl
ular roadway. M
with the road, can
w they should driv
g environment is e
ame speed.
Speed Limits
equires speed limit
maximum, unles
w a need to lower
the state maximum
for turnpikes and c
h for four-lane di
tes and super two-l
for other locations
ed limits set? Whe
and the Ok
on (ODOT) must c
ce with traffic engi
nual of Uniform
adopted by the
. Speed limits o
proved by the Com
speed limits are
but usually with
speed zone studie
r local ODOT divis
mit
speed limits are de
ng speed limits slo
hanged? Would ch
This brochure w
s.
o
reflect the reasonab
particular roadwa
ortable speed, not
l get them where th
delay.
rily to inform mot
le by a majority o
Motorists, especial
n use this inform
ve on a particular
established when m
ts on state roadway
ss traffic and eng
a limit for safety
m at:
certain rural interst
ivided highways i
ane highways
s on the highway sy
en setting speed lim
klahoma Departm
conduct engineering
ineering practices
Traffic Control
Oklahoma Transp
on highways outs
mmission. When in
e still approved
city concurrence.
es on highways sh
sion office.
termined?
ow down
hanging a
will help
ble speed
ay. Most
too slow
hey want
torists of
of drivers
lly those
mation to
road. A
motorists
ys be set
gineering
reasons.
tates
including
ystem
mits, city
ment of
g studies
as stated
Devices
portation
side city
nside city
by the
Citizen
hould be
ODO
the
on c
tran
*Spe
scho
moto
med
elec
info
801
Sp
Spee
perc
majo
soun
high
Spee
perc
vehi
calc
refle
mad
wea
Othe
such
cras
gene
The
85th
perc
the v
situa
amo
cond
hidd
cras
Onc
sign
max
OT only has jurisd
state highway sys
city streets or coun
sportation departm
ecial situations ex
ool buses, school
orcycles, motor-d
dium speed electr
ctric personal assi
rmation on these, s
through 806.
eed Zone Stu
ed limits on Oklah
centile method, w
ority of drivers wil
nd engineering pri
hways nationwide f
ed studies are c
centile speed. Th
icles is tallied a
culated using gathe
ection of a normal
de on weekdays du
ather conditions.
er data collected
h as curves, surface
sh history, cross str
erate traffic.
speed limit is nor
h percentile speed
centile speed is tha
vehicles are traveli
ations, the posted s
ount below the
ditions are present
den street returns, h
sh ranking.
ce the study is com
ns are posted along
ximum legal speed
diction over setting
tem. Questions a
nty roads should b
ments of those local
xist under Oklahom
l zones, state pa
driven cycles, sco
ric vehicles, elect
istive mobility dev
see Oklahoma State
udies
homa highways ar
which represents
ll be traveling at or
inciple used to set
for the past 60 year
conducted to dete
he observed free-fl
and the 85th per
ered information.
l traffic situation,
uring off peak hour
typically shows r
e width and type, ri
reets, school crossi
rmally set at the ne
d ending in a 5 o
at speed at or belo
ing during the stud
speed limit may be
85th percentile
t, such as: narrow
high number of dri
mpleted, black-on-w
g the highway to al
for a particular sec
g speed limits on
about speed limits
be directed to the
governments.
ma State Law for
arks, solid tires,
ooters, low and
tric gopeds, and
vices. For more
e Statutes §47-11-
re set by the 85th
the speed the
r below. This is a
t speed limits on
rs.
ermine the 85th
flowing speed for
rcentile speed is
To ensure a true
speed studies are
rs under favorable
roadway features
ight of way width,
ings and sites that
earest value to the
or 0. The 85th
ow which 85% of
dy period. In rare
e lowered a small
speed if some
pavement width,
iveways, and high
white speed limit
lert drivers of the
ction of roadway.
Speed limit
the penaltie
Can a Sp
There are dis
the 85th perc
unreasonably
drive that sl
develop disre
When a spee
enforcement
being tickete
motorists who
Safety is
Most traffic
simple soluti
sometimes m
a particular p
control tool s
Research ha
reasonable sp
reduce the nu
may increase
ts may change
es do not. Drive
eed Limit Be
sadvantages to sett
centile speed. If
y low speed limit
lowly, they tend
espect for speed lim
ed limit is set below
officials must dea
d for exceeding th
o drive too fast.
the Primary
problems are not
ions. Requests fo
made with the admir
roblem. However,
olve all the traffic p
s shown that spe
peed of most dri
umber of crashes o
with unreasonably
periodically; ho
Oklahoma frien
e Too Low?
ting speed limits fa
reasonable drivers
without seeing a
to ignore the sig
mits in general.
w the 85th percen
al with reasonable
he posted limit, as
Concern
t simple and do n
or lower speed lim
rable motive to “qu
, rarely does a sing
problems in a com
eed limits set be
ivers do not sign
on a road. In fact,
y low speed limits.
owever,
ndly.
ar below
s see an
need to
gns and
tile; law
e people
well as
not have
mits are
uick fix”
le traffic
munity.
low the
ificantly
, crashes

Changing
Have you ev
Who sets the
traffic? How
speed limit s
answer some
What Spe
Speed limits
of the majori
drivers natur
or not too fas
to go safely a
Speed limits
the speed co
on a particu
unfamiliar w
evaluate how
safer driving
drive at the s
Setting S
State law* re
at the state
studies show
The law sets
• 75 mph
• 70 mph
interstat
• 65 mph
How are spee
governments
Transportatio
in accordanc
in the Man
(MUTCD) a
Commission.
limits are app
limits, the
Commission
requests for
made to their
g a Speed Lim
er wondered how s
em? Does lowerin
do you get one ch
solve a problem?
e of these questions
eed Limits Do
are established to r
ity of drivers on a
rally select a comfo
st, but one that will
and without undue
are posted primar
nsidered reasonabl
ular roadway. M
with the road, can
w they should driv
g environment is e
ame speed.
Speed Limits
equires speed limit
maximum, unles
w a need to lower
the state maximum
for turnpikes and c
h for four-lane di
tes and super two-l
for other locations
ed limits set? Whe
and the Ok
on (ODOT) must c
ce with traffic engi
nual of Uniform
adopted by the
. Speed limits o
proved by the Com
speed limits are
but usually with
speed zone studie
r local ODOT divis
mit
speed limits are de
ng speed limits slo
hanged? Would ch
This brochure w
s.
o
reflect the reasonab
particular roadwa
ortable speed, not
l get them where th
delay.
rily to inform mot
le by a majority o
Motorists, especial
n use this inform
ve on a particular
established when m
ts on state roadway
ss traffic and eng
a limit for safety
m at:
certain rural interst
ivided highways i
ane highways
s on the highway sy
en setting speed lim
klahoma Departm
conduct engineering
ineering practices
Traffic Control
Oklahoma Transp
on highways outs
mmission. When in
e still approved
city concurrence.
es on highways sh
sion office.
termined?
ow down
hanging a
will help
ble speed
ay. Most
too slow
hey want
torists of
of drivers
lly those
mation to
road. A
motorists
ys be set
gineering
reasons.
tates
including
ystem
mits, city
ment of
g studies
as stated
Devices
portation
side city
nside city
by the
Citizen
hould be
ODO
the
on c
tran
*Spe
scho
moto
med
elec
info
801
Sp
Spee
perc
majo
soun
high
Spee
perc
vehi
calc
refle
mad
wea
Othe
such
cras
gene
The
85th
perc
the v
situa
amo
cond
hidd
cras
Onc
sign
max
OT only has jurisd
state highway sys
city streets or coun
sportation departm
ecial situations ex
ool buses, school
orcycles, motor-d
dium speed electr
ctric personal assi
rmation on these, s
through 806.
eed Zone Stu
ed limits on Oklah
centile method, w
ority of drivers wil
nd engineering pri
hways nationwide f
ed studies are c
centile speed. Th
icles is tallied a
culated using gathe
ection of a normal
de on weekdays du
ather conditions.
er data collected
h as curves, surface
sh history, cross str
erate traffic.
speed limit is nor
h percentile speed
centile speed is tha
vehicles are traveli
ations, the posted s
ount below the
ditions are present
den street returns, h
sh ranking.
ce the study is com
ns are posted along
ximum legal speed
diction over setting
tem. Questions a
nty roads should b
ments of those local
xist under Oklahom
l zones, state pa
driven cycles, sco
ric vehicles, elect
istive mobility dev
see Oklahoma State
udies
homa highways ar
which represents
ll be traveling at or
inciple used to set
for the past 60 year
conducted to dete
he observed free-fl
and the 85th per
ered information.
l traffic situation,
uring off peak hour
typically shows r
e width and type, ri
reets, school crossi
rmally set at the ne
d ending in a 5 o
at speed at or belo
ing during the stud
speed limit may be
85th percentile
t, such as: narrow
high number of dri
mpleted, black-on-w
g the highway to al
for a particular sec
g speed limits on
about speed limits
be directed to the
governments.
ma State Law for
arks, solid tires,
ooters, low and
tric gopeds, and
vices. For more
e Statutes §47-11-
re set by the 85th
the speed the
r below. This is a
t speed limits on
rs.
ermine the 85th
flowing speed for
rcentile speed is
To ensure a true
speed studies are
rs under favorable
roadway features
ight of way width,
ings and sites that
earest value to the
or 0. The 85th
ow which 85% of
dy period. In rare
e lowered a small
speed if some
pavement width,
iveways, and high
white speed limit
lert drivers of the
ction of roadway.
Speed limit
the penaltie
Can a Sp
There are dis
the 85th perc
unreasonably
drive that sl
develop disre
When a spee
enforcement
being tickete
motorists who
Safety is
Most traffic
simple soluti
sometimes m
a particular p
control tool s
Research ha
reasonable sp
reduce the nu
may increase
ts may change
es do not. Drive
eed Limit Be
sadvantages to sett
centile speed. If
y low speed limit
lowly, they tend
espect for speed lim
ed limit is set below
officials must dea
d for exceeding th
o drive too fast.
the Primary
problems are not
ions. Requests fo
made with the admir
roblem. However,
olve all the traffic p
s shown that spe
peed of most dri
umber of crashes o
with unreasonably
periodically; ho
Oklahoma frien
e Too Low?
ting speed limits fa
reasonable drivers
without seeing a
to ignore the sig
mits in general.
w the 85th percen
al with reasonable
he posted limit, as
Concern
t simple and do n
or lower speed lim
rable motive to “qu
, rarely does a sing
problems in a com
eed limits set be
ivers do not sign
on a road. In fact,
y low speed limits.
owever,
ndly.
ar below
s see an
need to
gns and
tile; law
e people
well as
not have
mits are
uick fix”
le traffic
munity.
low the
ificantly
, crashes